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Chemical Engineering :: Fertiliser Technology

  1. In an ammonia plant, the purge off is essential to

  2. A.

     Maintain inert gas concentration within a limit

    B.

     Remove excess poisonous gases

    C.

     Maintain H₂ : N₂ ratio at 3 :1

    D.

     Remove uncondensed ammonia vapour


  3. Which of the following is not a measure component necessarily to be present in fertilisers?

  4. A.

     Nitrogen

    B.

     Potassium

    C.

     Phosphorous

    D.

     Sulphur


  5. Color of nitric acid is light yellow due to the presence of

  6. A.

     NO

    B.

     NO₂

    C.

     N₂H₅

    D.

     NH₃


  7. Dehydration of ammonium carbamate (to produce urea) is a/an __________ reaction.

  8. A.

     Reversible

    B.

     Catalytic

    C.

     Exothermic

    D.

     Endothermic


  9. Sodium tri poly phosphate (STPP) is chemically represented as

  10. A.

     Na₅P3O₁₀

    B.

     Na₄P3O₈

    C.

     Na₃P4O₆

    D.

     Na₂PO₄


  11. Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of __________ this is normally not done.

  12. A.

     Increased biuret formation

    B.

     High corrosion rate

    C.

     Increased cost of equipment

    D.

     All of the above


  13. Conversion of yellow phosphorous to red phosphorous is done by heating it in covered retorts at __________ °C in absence of air.

  14. A.

     50-80

    B.

     250-400

    C.

     1000-1200

    D.

     800-900


  15. __________ is not a fertiliser.

  16. A.

     Calcium ammonium nitrate

    B.

     Ferrous sulphate

    C.

     Liquid ammonia

    D.

     Ammonium sulphate


  17. Formation of ammonium carbamate by reaction of NH₃ with CO₂ is a/an __________ reaction.

  18. A.

     Catalytic

    B.

     Exothermic

    C.

     Endothermic

    D.

     Reversible


  19. I argest capacity nitrogenous fertiliser plants (2700 tons of NH₃ per day) (2 Nos) in India are located at

  20. A.

     Thal-Vaishet (under RCF in Maharashtra) and Hazira (under IFFCO in Gujarat)

    B.

     Talchar (Orissa) and Ramagundam (A.P.) both under FCI

    C.

     Korba (M.P.) and Talchar (Orissa) both under FCI

    D.

     Haldia (W.B) and Namrup (Assam) both under HFC